Heating-furnace.



S. S. WALES.

HEATING FURNACE.

' APPLICATION FILED 9110.24, 1907.

Patented Feb. 27, 1912.

3 SHEETS-SHEET 1.

I w w v INVENTOR did, M

WITNESSES COLUMBIA PLANOflRAPl-l Cm, WASHINGTON, D. c.

S. S. WALES.

HEATING FURNAGE.

APPLICATION FILED DBO. 24, 1907.

1,018,999. Patented Feb. 27, 1912.

3 SHEETS-SHEET 2.

COLUMBIA PLANOGRAPH c0..wASHlNuToN, D, c.

S. S. WALES.

HEATING FURNACE.

APPLIOATION IILED 113014 1907.

1,018,999. Patented Feb. 27., 1912 3 SHEETS-SHEET 3.

WITNESSES INVENTOR COLUMBIA PLANOGIIAPH co.,vlAsnmc1oN. D. c.

, plication UNITED STATES SAMUEL s. WALES, or MIlrNI-IALL, PENNSYLVANIA.

HEATING-FURNACE.

Specification of Letters Patent.

Patented Feb. 2'7, 1912.

Application filed December 24, 1907. Serial No. 407,884.

To all whom it may concern Be it known that I, SAMUEL S. l/VALEs, of Munhall, Allegheny county, Pennsylvania, have invented a new and useful I-Ieating-Furnace, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a longitudinal vertical section; Fig. 2 is a bottom plan view partly broken away; and Fig. 3 is a view similar to Fig. 1 showing another arrangement of the furnace and bottom.

My invention relates to apparatus for applying heat to one side of a ballistic armor or vault plate, while simultaneously cooling its opposite face; in accordance with my ap- No. 401,702, dated November 11th, 1907.

In the drawings, 2 represents the roof, 3 the end walls, and 4, 4 the side walls of a furnace chamber, which I have shown as having inlet and outlet ports 5, 6 in the opposite sides. The ends 2 are formed as inclined doors, which may be raised and lowered to any desirable height. The side walls and roof are stationary, while the bottom 7 is built up on a carriage 8 having wheels 9 moving upon a suitable track which extends through the furnace. On the refractory bottom 7 I set separated stools 10, on which is placed a metal plate 11 which is-larger than the plate to be treated, and is of any desirable thickness for the mechanical strength desired. On this plate 11 is-supported a system of pipes, by which the cooling medium is forced against the bottom face of the plate 12 being treated, and around this supply pipe system is built a sealing strip system, which in the present case is shown as composed of angles 13 which interfit at the corners. These angles, or other sealing strips, are preferably secured to the plate 11 in such a manner as to allow little or no leakage, and are preferably riveted thereto to form a part of the permanent structure of the false bottom. The plate 12 to be treated rests on suit-able stools 14 placed on the plate 11 and extending upwardly between the pipes, and around the sealing strip system I build a refractory wall 18 extending around all four sides, this being usually composed of firebrick. This wall is temporary in character, and where the plate to be treated is shorter or narrower than the space inclosed by the .brick walls, I fill in'the intervening space with thin metal plates, as shown at 15 in Fig. 1, the plate in this case being shorter than the inclosing space and of the complete width thereof. These thin metal plates 15 may be supported on suitable walls, and after they are in place the space between them and the top of the plate 12 and the brick walls is filled in with loam, or some poor heat-conducting material 16.

In actual practice the structure is built up on the plate 11 complete on the floor of the shop, and the bottom 7 is then run out and the structure lifted, and placed upon the stools 10. The bottom is then run back into the furnace and the doors 3 lowered down, the rear door resting on the furnace bottom and the front door resting on the brick wall 13 The furnace in the mean time has been heated to a high temperature, to which the plate is at once subjected, and during this heating treatment of the upper face of the plate its lower face is continuously cooled by applying a water-spray thereto in the form shown in the drawings. It will, be understood, of course, that this artificial cooling of the lower portion of the plate, may be carried out by other means, such as steam, air, or other suitable fluid.

In the present case, 17 is the main waterfeed pipe, extending to a manifold 18, which is preferably outside of the sealing strip and brick wall system on the plate 11, but rest-- ing on a forwardly projecting portion of this plate. From this manifold extend the branch feed pipes 19, each of which is provided with a valve or controlling device 20, these being external to the furnace. The other ends of these pipes 19 are connected to one or more of th transverse spray pipes 21, which preferably extend over the pipes 19 and may be connected thereto by nip les.

In case of a curved plate, such as a arbette plate, the nipples for some of the crosspipes may be lengthened in proportion to the height of the plate above them. This will bring the cross-pipes into the same relation to the surface at all points in the length of the plate and give an even distri bution of the cooling fluid.

Instead of using the nipples of different lengths, I may simply regulate the cooling action at the different points by means of the control valves 20, the nipples being of the same height throughout. In this way, I- can give suflicient pressure at the center or point of greatest distance of plate from the pipes to allowv the cooling medium to reach the bottom of the plate at this point.

At the front ofthe plate 11 the lower angles 13 are curved outwardly, as shown in Fig. 2, thus leaving an outlet for the water. The upper angle is carried across this open ing to support the brick wall 13*, and the water flows out into a discharge tank 22 or sewer, as shown in Fig. 1. The surface of the plate is brought up to the desired temperature in the furnace, and maintained at such temperature for the desired length of time, the back at the same time being kept cool by the application of fluid. After the operation is completed, the water is cut off, the front door is raised, the carriage is run out of the furnace, the structure built on plate 11 is removed from the furnace, and the plate is taken oil, and subjected to the water-hardening treatment if such is desired. The bottom 7 is then run back into the furnace, and the doors lowered thereon so that the furnace retains its heat. The operations may then be repeated.

In Fig. 3 I show a form similar to that of the other figures, except that the structure for the plate is built up on a movable bottom, which rests on a carriage, and is distinct from the refractory bottom of the furnace, which is also carried on another carriage. In this figure 7 a is the refractory bottom, which is carried on the carriage 8 as in the first form. This carriage is coupled to the carriage 24, which travels on the same tracks, and carries plate 11 permanently secured thereto.

At the beginning of the process the refractory bottom 7 forms the bottom of the furnace with the doors dropped thereon. At this time the truck 24 is external and the plate and the surrounding structure are built upon this bottom; When the parts are ready, the doors are lifted and the bottoms 7 and 24 are moved back, the truck 24 taking the place of the truck 8 below the furnace, and the doors may then be lowered and the treatment carried on as before. In this case the bottom 7 may be moved in under a retaining hood 25 for the purpose of retaining its heat during the time that the plate is being treated, and this hood may ormay not be heated by any suitable source of heat.

Many variations may be made in the form and arrangement of the furnace bottom, plate structure, &c., without departing from my invention, since I consider myself the first to apply cooling fluid to a plate while it is being heated in a furnace.

I claim 1. In a heating furnace having a bottom laterally movable into and out of position in said furnace, a removable superstructure mounted on the furnace bottom and arranged to support plates placed thereon out of contact with said bottom, and a system of spray pipes above the furnace bottom arranged to spray a cooling fluid onthe lower face of plates on said superstructure within the furnace.

2. In a heating furnace having a bottom laterally movable into and out of position in said furnace, a removable superstructure mounted on the furnace bottom and arranged to support plates placed thereon out of contact with said bottom, and a system of spray pipes between the furnace bottom and plates carried thereon by the super structure arranged to force a series of jets of cooling fluid against the lower face of plates carried on said superstructure while applying heat to the upper face of, said plate Within the furnace.

3. In a heating furnace having a bottom laterally movable into and, out of position in said furnace, a removable superstructure mounted on the furnace bottom and arranged to support plates placed thereon out of contact with said bottom, a system of spray pipes above the furnace bottom arranged to spray a cooling fluid on the lower face of plates on said superstructure within the furnace, and an overflow outlet arranged to carry the overflow of cooling fluid to the exterior of the furnace.

In testimony whereof, I have hereunto set my hand.

S. S. -WALES. Witnesses:

JOHN MILLER, H. M. CoRwIN.

Oopiesof this patent may be obtained for five cents each, by addressing the Washington, D. 0. 

